<template>
  <div class="app-container">
    <el-form ref="form" :model="form" label-width="90px">
      <el-row :gutter="20">
        <el-col :span="12">
          <el-form-item label="文章标题" prop="title">
            <el-input v-model="form.title" placeholder="请输入文章标题" maxlength="30" />
          </el-form-item>
        </el-col>
        <el-col :span="6">
          <el-form-item label="分类">
            <el-select v-model="form.categoryId" placeholder="请选择">
              <el-option v-for="category in categoryList" :key="category.id" 
               :label="category.name" :value="category.id" />
               <!-- <el-option :key="'1'" label="女" :value="'1'" /> -->
            </el-select>
          </el-form-item>
        </el-col>
        <el-col :span="6">
          <el-form-item label="标签">
            <el-select v-model="form.tags" placeholder="请选择" multiple>
              <el-option v-for="tag in tagList" :key="tag.id" :label="tag.name" :value="tag.id" />
            </el-select>
          </el-form-item>
        </el-col>
      </el-row>
      <el-row :gutter="20">
        <el-col :span="12">
          <el-form-item label="文章摘要">
            <el-input v-model="form.summary" type="textarea" />
          </el-form-item>
        </el-col>
        <el-col :span="6">
          <el-form-item label="允许评论">
            <el-radio-group v-model="form.isComment">
              <el-radio :key="'1'" :label="'1'">正常</el-radio>
              <el-radio :key="'0'" :label="'0'">停用</el-radio>
            </el-radio-group>
          </el-form-item>
        </el-col>
        <el-col :span="6">
          <el-form-item label="是否置顶">
            <el-radio-group v-model="form.isTop">
              <el-radio :key="'1'" :label="'1'">是</el-radio>
              <el-radio :key="'0'" :label="'0'">否</el-radio>
            </el-radio-group>
          </el-form-item>
        </el-col>

      </el-row>
      <el-row :gutter="20" />

      <el-row :gutter="20">
        <el-col :span="12">
          <el-form-item label="缩略图">
            <el-upload :file-list="fileList" class="upload-demo" list-type="picture" drag name="img" action="upload"
                :on-remove="fileRemove" :limit="1" :http-request="handleUpload" :on-exceed="onExceed">
                <i class="el-icon-upload" />
                <div class="el-upload__text">将文件拖到此处，或<em>点击上传</em></div>
                <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
            </el-upload>
          </el-form-item>
        </el-col>
        <el-col :span="12">
          <el-form-item>
            <el-button type="primary" size="medium" @click="handleSubmit">{{ aId ? "更新" : "发布" }}</el-button>
          </el-form-item>
          <el-form-item>
            <el-button v-if="!aId" type="info" @click="handleSave">保存到草稿箱</el-button>
          </el-form-item>

        </el-col>
      </el-row>
      <!-- mavon-editor -->
      <el-row>
        <mavon-editor ref="md" v-model="form.content" @imgAdd="addImg" />
      </el-row>
    </el-form>
  </div>
</template>

<script>
import { listAllCategory } from '@/api/content/category'
import { uploadImg } from '@/api/content/upload'
import { addArticle, getArticle, updateArticle } from '@/api/content/article'
import { listAllTag } from '@/api/content/tag'
export default {
  name: 'Write',
  data() {
    return {
      form: {
        title: '',
        thumbnail: '',
        isTop: '1',
        isComment: '1',
        content: ''
      },
      categoryList: [], //分类列表
      tagList: [], //标签列表
      aId: -1,
      fileList: [] //绑定已上传的文件列表（数组），用于显示或回显文件。
    }
  },
  watch: {
    $route: {
      handler: function (route) {
        this.aId = route.query && route.query.id
        console.log(this.aId)
      },
      immediate: true
    }
  },
  created() {
    this.getCategoryAndTag()
    if (this.aId) {
      this.getArticle()
    }
  },
  methods: {
    getArticle() {
      getArticle(this.aId).then(response => {
        this.form = response.data
        this.fileList.push({ name: '缩略图', url: response.data.thumbnail })
      })
    },
    /** 保存草稿 */
    handleSave() {
      this.form.status = '1'
      addArticle(this.form).then(response => {
        this.$modal.msgSuccess('保存草稿成功')
      })
    },
    /** 提交 */
    handleSubmit() {
      if (!this.aId) {
        this.form.status = '0' //文章状态（0 已发布）
        addArticle(this.form).then(response => {
          this.$modal.msgSuccess('博客发布成功')
          this.$router.push({ path: '/content/article' })
        })
      } else {
        // 更新博客信息
        updateArticle(this.form).then(response => {
          this.$modal.msgSuccess('博客更新成功')
          this.$router.push({ path: '/content/article' })
        })
      }
    },
    /** 文件超出限制时的回调 */
    onExceed() {
      this.$message.error('只能上传一个图片')
    },
    /** 自定义文件上传逻辑 */
    handleUpload(img) {
      uploadImg(img.file).then(response => {
        this.form.thumbnail = response.data
        this.fileList.push({ name: img.file.name, url: response.data })
      }).catch(error => {
        this.$message.error(error.msg)
      })
    },
    /** 文件移除时的回调 */
    fileRemove(file, fileList) {
      this.fileList.pop()
    },
    // 绑定@imgAdd event
    addImg(pos, file) {
      // 第一步.将图片上传到服务器.
      console.log("第一步.将图片上传到服务器.");
      uploadImg(file).then(response => {
        // 第二步.将返回的url替换到文本原位置![...](0) -> ![...](url)
        // console.log("=========>",response);
        this.$refs.md.$img2Url(pos, response.data)
      }).catch(error => {
        this.$message.error(error.msg)
      })
    },
    /** 查询分类and标签列表 */
    getCategoryAndTag() {
      listAllCategory().then((response) => {
        this.categoryList = response.data
      })
      listAllTag().then(response => {
        this.tagList = response.data
      })
    },
    beforeAvatarUpload(file) {
      const isJPG = file.type === 'image/jpeg'
      const isLt2M = file.size / 1024 / 1024 < 2

      if (!isJPG) {
        this.$message.error('上传头像图片只能是 JPG 格式!')
      }
      if (!isLt2M) {
        this.$message.error('上传头像图片大小不能超过 2MB!')
      }
      return isJPG && isLt2M
    }
  }
}
</script>
<style scoped>
/* div .upload-demo { */
/* padding-left: 80px; */
/* } */
.el-col .el-upload {
  border: 1px dashed #d9d9d9;
  border-radius: 6px;
  cursor: pointer;
  position: relative;

  overflow: hidden;
}

.avatar-uploader .el-upload:hover {
  border-color: #409EFF;
}

.avatar-uploader-icon {
  font-size: 28px;
  color: #8c939d;
  width: 178px;
  height: 178px;
  line-height: 178px;
  text-align: center;
}

.avatar {
  width: 178px;
  height: 178px;
  display: block;
}
</style>
